Former Chicago P.D. regular Brian Geraghty will reprise his role as Sean Roman, but not for a happy reason.
Roman is back to try and help his suffering sister, and the way he goes about it will evidently make Fire’s Severide suspicious.
The next One Chicago crossover between Chicago Fire and Chicago P.D. is on the way before the end of the month, and details about the case that brings Firehouse 51 and the Intelligence Unit together reveal that a familiar face will be back.